It is normal for a person to regret a decision regardless of age. Just hang around, you'll regret a few more before it's all said and done :).
ya that's normal xD it happens to me way too much and I'm 19! it ain't easy making a mature/wise decision... sometimes you gotta grow a pair and stick with the decision you made and follow things through till the end~ and then you can skimp out when no one's watching O . O I mean... good job kiddo